// PL0 Compiler
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include "pl0.h"

void main(int argc,char *argv[])
{
	char filename[256];
	printf("pl/0 compiler version 1.0\nwriten by ivy qin, 2002-11-1\n");
	if (argc!=2)
	{
		printf("source file:");
		gets(filename);
	}
	else
		strcpy(filename,argv[1]);

	CPlCompiler pl(filename);
	char ch;

	if (pl.FileEmpty())
	{
		printf("source file cannot be opened!\n");
		return;
	}

	printf("list source file?(y/n): ");
	ch=getch();
	while (ch!='y'&&ch!='n') ch=getch();
	printf("%c\n",ch);
	if (ch=='y') pl.DisplaySrcfile();

	printf("compiling...\n\n");
	pl.Compile();
	if (pl.ErrorNumber())
	{
		pl.DisplayErrors();
		printf("continue?(y/n): ");
		ch=getch();
		while (ch!='y'&&ch!='n') ch=getch();
		printf("%c\n",ch);
		if (ch=='n') return;
	}

	printf("list object code?(y/n): ");
	ch=getch();
	while (ch!='y'&&ch!='n') ch=getch();
	printf("%c\n",ch);
	if (ch=='y') pl.ListCode();
	printf("start\n");
	pl.Interpret();
}